Q. I work in a small office (there are only six of us), and we have a very open, familylike atmosphere.

Recently, a co-worker began making YouTube videos of her dog doing silly things.

She enjoys showing the videos at work, which (while distracting) seemed like a pretty harmless waste of time. However, a few days ago she began showing some inappropriate videos of her pet going potty, among other foul doggie behavior.

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I have tried telling her to please not show those videos, but everyone tells me I’m just being a spoil sport and to just ignore it if I don’t like it.

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What can I do when my co-worker refuses to stop playing those horrid videos, especially with everyone supporting her?

Tube’d Out

A. Your colleague’s behavior is disrespectful, not only to you but to her dog. This may sound silly to some people, but exploiting animals for your own lowbrow human purposes is the very essence of inhumane. Furthermore, this colleague’s exploits are escalating and very soon she could cross a line, which should prompt a call to your local Humane Society (humanesociety .org).

You have made your own views known (good for you). Without support from the boss (and in an environment too small for an HR department), you cannot control this tasteless co-worker. You should take your boss’s suggestion and exit from this activity.

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Q. I very recently discovered that I have a son. He is a grown man, and our newly found relationship has been great.

He is getting married in a few months, and my wife and I have been invited to the wedding. It seems that as the father I have a greater responsibility than just being a guest and am wondering how much an appropriate wedding gift should be.

New Dad

A. You don’t say if your son was raised with a (different) dad in his daily life. If so, he may choose to celebrate this father relationship by asking this man to stand up with him at his wedding.

You should ask him if there is something you can do for him and his bride for the wedding. They might appreciate it if you offered to pay for an aspect of their celebration, such as hiring a photographer.

Your main job is to be a great guest and follow your son’s lead. He may want you to be a low-key but proud witness to his big day.

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Q. I’m responding to your answer to “Caring Colleague,” the person wanting to know how to respond to a friend’s announcement of his sibling’s new child with Down syndrome.

I felt your answer was well-meant but wrong. As a parent of a 7-year-old with Down, I received both wonderful and horrid responses to the news of my child’s diagnosis. The correct answer is “Congratulations!”

Just because the challenges faced by parents with kids with Down are different than the planned challenges, there is simply no need to acknowledge the road ahead as tougher than anyone else’s road. It is more work; it is more worry. But the benefits of having a child with Down totally level the playing field here. The birth of this child is a joyful thing. End of story.